Mr. Lienert reports to Oxy President and Chief Operating Officer Stephen
I. Chazen, who has served as CFO since 1999.

“Jim Lienert, our new Chief Financial Officer, has held a series of
positions with the company that have given him a deep understanding of
both the financial and operational aspects of our business. Jim is a
person of high personal integrity. I join the Board of Directors in
congratulating him on this well deserved promotion,” said Mr. Chazen.

Mr. Lienert served as Occidental Petroleum Corporation Executive Vice
President, Finance and Planning since 2006. Reporting to him in the role
was the accounting function, as well as supply chain, information
technology and planning.

Previously, Mr. Lienert served as President of Occidental Chemical
Corporation (OxyChem). He joined OxyChem in 1974 and held a series of
increasingly senior positions, culminating in his appointment as OxyChem
President in February 2004.

Mr. Lienert holds a Bachelor of Science in Accounting and an MBA from
the State University of New York at Buffalo. He is a Certified Public
Accountant in the state of Texas.

About Oxy

Occidental Petroleum Corporation is an international oil and gas
exploration and production company with operations in the United States,
Middle East/North Africa and Latin America regions. Oxy is the fourth
largest U.S. oil and gas company, based on equity market capitalization.
Oxy's wholly owned subsidiary, OxyChem, manufactures and markets
chlor-alkali products and vinyls. Occidental is committed to
safeguarding the environment, protecting the safety and health of
employees and neighboring communities and upholding high standards of
social responsibility in all of the company's worldwide operations.